A method of calibrating an autofocus (AF) lighting device of a camera is disclosed. A reference image is captured with light projected from the AF lighting device, and a relative position of a central coordinate of the projected light with respect to a central coordinate of the reference image is stored. When operating the camera, the AF lighting device is activated to emit light after a shutter button of the camera is pressed halfway down, and a preview picture is displayed on a panel of the camera. A central position of the emitted light is then transposed toward a center of the panel according to the stored relative position.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A method of calibrating an autofocus lighting device of a camera, comprising: capturing a reference image with light projected from the autofocus lighting device; storing a relative position of a central coordinate of the projected light with respect to a central coordinate of the reference image; when operating the camera, activating the autofocus lighting device to emit light after a shutter button of the camera is pressed halfway down, and displaying a preview picture on a panel of the camera; and transporting a central position of the emitted light toward a center of the panel according to the stored relative position.
2. The method of claim 1 , wherein the autofocus lighting device is a light-emitting diode (LED).
3. The method of claim 1 , wherein the step of storing the relative position comprises: storing the central coordinate of the reference image and the central coordinate of the projected light.
4. The method of claim 3 , wherein the central coordinate of the reference image and the central coordinate of the projected light are stored in a memory device of the camera.
5. The method of claim 1 , wherein the autofocus lighting device is activated when brightness surrounding the camera is below a predetermined threshold.
6. The method of claim 1 , wherein the step of transporting the position of the emitted light comprises: adjusting the preview picture by scaling the preview picture to move the central position of the emitted light toward the center of the panel.
7. The method of claim 6 , wherein the step of transporting the position of the emitted light further comprises: user shifting the camera to make an object to be focused to be positioned in the center of the panel.
8. The method of claim 1 , further comprising a step of marking around the center of the panel with an autofocus marking before the shutter button of the camera is pressed fully down.
9. The method of claim 1 , further comprising a step of releasing the scaling action and displaying the preview picture before the shutter button is pressed fully down.
10. A method of calibrating an autofocus lighting device of a camera, comprising: capturing a reference image with light projected from the autofocus lighting device; and storing a relative position of a central coordinate of the projected light with respect to a central coordinate of the reference image; wherein the stored relative position is then accordingly utilized during camera operation to transport a central position of light emitted from the autofocus lighting device toward a center of a panel of the camera.
11. The method of claim 10 , wherein the autofocus lighting device is a light-emitting diode (LED).
12. The method of claim 10 , wherein the step of storing the relative position comprises: storing the central coordinate of the reference image and the central coordinate of the projected light.
13. The method of claim 12 , wherein the central coordinate of the reference image and the central coordinate of the projected light are stored in a memory device of the camera.
14. A method of calibrating an autofocus lighting device of a camera, in which a relative position of a central coordinate of projected light from the autofocus lighting device with respect to a central coordinate of a reference image is pre-stored, the method comprising: when operating the camera, activating the autofocus lighting device to emit light after a shutter button of the camera is pressed halfway down, and displaying a preview picture on a panel of the camera; and transporting a central position of the emitted light toward a center of the panel according to the stored relative position.
15. The method of claim 14 , wherein the autofocus lighting device is a light-emitting diode (LED).
16. The method of claim 14 , wherein the autofocus lighting device is activated when brightness surrounding the camera is below a predetermined threshold.
17. The method of claim 16 , wherein the step of transporting the position of the emitted light comprises: adjusting the preview picture by scaling the preview picture to move the central position of the emitted light toward the center of the panel.
18. The method of claim 17 , wherein the step of transporting the position of the emitted light further comprises: user shifting the camera to make an object to be focused to be positioned in the center of the panel.
19. The method of claim 14 , further comprising a step of marking around the center of the panel with an autofocus marking before the shutter button of the camera is pressed fully down.
20. The method of claim 14 , further comprising a step of releasing the scaling action and displaying the preview picture before the shutter button is pressed fully down.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
May 17, 2010
March 13, 2012
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